<template>
  <div class="login">
    <div class="login-box">
      <header class="avatar">
        <img src="../../assets/logo.png" alt="" />
      </header>

      <el-form
        class="form"
        ref="loginFormRules"
        :rules="loginFormRules"
        :model="loginForm"
        label-width="0px"
      >
        <el-form-item prop="username">
          <el-input v-model="loginForm.username">
            <i slot="prefix" class="iconfont icon-geren"></i>
          </el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input v-model="loginForm.password" type="password">
            <i slot="prefix" class="iconfont icon-suo"></i>
          </el-input>
        </el-form-item>
        <el-form-item class="btn">
          <el-button type="primary" @click="login" :loading="loginLoading">登录</el-button>
          <el-button type="info" @click="reset">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      loginLoading:false,
      loginForm: {
        username: "admin",
        password:"123456",
      },
      loginFormRules: {
        // 验证用户名是否合法
        username: [
          { required: true, message: "请输入登录名称", trigger: "blur" },
          {
            min: 5,max: 10,message: "长度在 5 到 10 个字符",trigger: "blur",
          },
        ],
        // 验证密码是否合法
        password: [
          { required: true, message: "请输入登录密码", trigger: "blur" },
          {
            min: 6,
            max: 15,
            message: "长度在 6 到 15 个字符",
            trigger: "blur",
          },
        ],
      },
    };
  },
  methods:{
    login() {
      this.loginLoading = true
      this.$refs.loginFormRules.validate(async valid => {
        console.log(valid);
        if (!valid) {
          return (this.loginLoading = false)
        }
        const { data: res } = await this.$http.post('login', this.loginForm)
        // const res = await this.$http.post('login', this.loginForm)
        if (res.meta.status !== 200) {
          this.loginLoading = false
          return this.$message.error('登录失败 帐号或密码错误!')
        }
        // console.log(res);
        this.$message.success('登录成功!')
        // 1. 将登录成功之后的 token,保存到客户端的 sessionStorage(会话机制/只在当前页面生效)中 localStorage(持久话机制/关闭页面也不会忘记数据)
        //   1.1 项目中除了登录之外的API接口,必须在登录之后才能访问
        //   1.2 token 只应在当前网站打开期间生效, 所以将 token 保存在 sessionStorage中
        window.sessionStorage.setItem('token', res.data.token)
        // 2. 通过编程式路由导航跳转到后台主页,路由地址是 /home
        this.$router.push('/home')
        this.loginLoading = false
      })
    },
    reset(){
      this.$refs.loginFormRules.resetFields()
    }
  }
}
</script>

<style lang="scss" scoped>
html,body,.login{
    height: 100vh;
    margin: 0;
    padding: 0;
    background-color: #2b4b6b;
}
.login {
  color: white;
      padding-top: 200px;
  .login-box {
    width: 450px;
    height: 300px;
    background-color: #f4f4f4;
    border-radius: 20px;

    margin:  auto ;
    position: relative;
    .avatar {
      width: 100px;
      height: 100px;
      position: absolute;
      left: 50%;
      transform: translate(-50%, 0px);
      top: -50px;
      border: 1px solid rgb(165, 129, 165);
      border-radius: 50%;
      box-shadow: 0 0 10px #ddd;
      img {
        width: 100px;
        height: 100px;
        border-radius: 50%;
        background-color: rgb(197, 196, 197);
      }
    }
    .form {
      width: 300px;
      position: absolute;
      left: 50%;
      transform: translateX(-50%);
      bottom: 0;
      .btn {
        display: flex;
        justify-content: center;
        flex-wrap: nowrap;
      }
    }
  }
}
</style>